1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
#include <bits/stdc++.h>
#define rep(i, a, b) for (int i = a; i <= b; i++)
#define per(i, a, b) for (int i = b; a <= i; i--)
#define cat(x) cerr << #x << " = " << x << '\n';
using ll = long long;
using namespace std;

const int N = 1 << 20;

int n, a[N];
ll res;

int main() {
	cin.tie(0)->sync_with_stdio(0);

	cin >> n;
	rep(i, 1, n) {
		int x;
		cin >> x;
		a[x] = i;
	}

	int l = n;
	int r = 1;
	rep(len, 1, n) {
		int id = (2 * n - len + 1) / 2;
		l = min(l, a[id]);
		r = max(r, a[id]);
		int x = max(1, r - len + 1);
		int y = min(l, n - len + 1);
		res += max(0, y - x + 1);
	}

	cout << 2 * n + 1 << ' ' << res << '\n';
	return 0;
}